SeaWiFS satellite ocean color images of chlorophyll a concentration (mg m23) with color bar; (A) 02 September 2003 and
(B) 31 October 2003; closed circle represents Seaglider position on these dates. See Fig. 1 for expanded regional map. Seaglider transects
between September 2002 and December 2007 are shown as gray solid lines; dashed circle highlights region analyzed in the text. See Fig. 2
for waterfall plots of Seaglider density and chlorophyll a for autumn 2003 transition from stratified to mixed upper ocean.